srdata.nist.gov · 214 mercury in other elements jangg and lugscheider (ref. 11) found negligible...

Mercury in Other Elements 213

COHPONENTS:

(1) Mercury; 8g; [7439-97-6]

(2) other Elements

EVALUATOR:

8. Lawrence CleverChemistry DepartmentEmory UniversityAtlanta, Geogia 30322

1986, June

USA

CRITICAL EVALUATION:

The Solubility of Mercury in Other Elements.

The solubility data in this section includes both mercury(l) + element(l) and mercury(l) + element(s) systems. In only one case, mercury +gallium (reL 8), was phase equilibrium measured and the solubility of theelement in mercury determined too. The liquid + liquid systems are mercury + phosphorous and mercury + gallium. The other systems are liquidsolute + solid solution systems. The mercury + zinc and the mercury + tinsystems were studied by emf methods at room temperature with the solid anelectrode in contact with aqueous solution. The mercury + sodium andmercury + potassium systems were studied by an electrical resistancetechnique. The other systems were studied by an x-ray method. In the xray method various amounts of mercury are heated with the element. Theelement lattice parameter is measured before and after the treatment. Ifthe lattice parameter changes by less than 0.001 x 10-lD m the solubilityof mercury in the solid is considered negligible. If the lattice parameter changes, the mercury composition at which the change stops is considered the solubility. There are no confirming papers in these studiesexcept for the mercury + silver and mercury + gold systems. The data areclassed tentative.

The papers in this section were found by a Chem. Abstr. search underthe heading "Mercury, properties, soly of". Papers listed under "Mercury,properties, systems", which may contain additional data, were not covered.Papers from this heading can be found in Sotubitity Series Vot. 25 Metatsin Mercury edited by Galus, Guminski and Hirayama.

The table below lists the systems for which data are known from ourliterature search. Given in the table is the element in order of itsatomic number, the temperature and mole fraction solubility of mercury inthe element, and the reference number.

----------------------------------------------------------------------Element Temperature Mercury Solubility Reference

T/K Mole Fraction, =1----------------------- ----------- ------------------ ---------Liquid + Liquid Systems

phosphorus; P 298 0.000176 7Gallium; Ga 308 0.020 8

373 0.032

Liquid + Solid Systems

Sodium; Na 296 0.00045 13333 0.00006

Silicon; Si + 1473 - 12phosphorus; P

Potassium; K 270 - 13318 -

Manganese; Mn 773 0.004 11Zinc; Zn 293 0.020 10Silver; Ag 373 0.364 3

549 0.372Tin; Sn 298 0.075 4Tellurium; Te 573 0.014 9

713 0.003platinum; Pt 493 0.01 11

528 0.153713 0.183903 0.226

Gold; Au 477 0.168 6583 0.182693 0.195

MIL-<>

214 Mercury in Other Elements

Jangg and Lugscheider (ref. 11) found negligible mercury solubilityin ninteen solid elements by the x-ray method. A small solubility belowtheir limit of detection may exist. The elements are aluminum, titanium,vanadium, chromium, iron, cobalt, nickel, zirconium, niobium, molybdenum,ruthenium, rhodium, tantalum, tungsten, rhenium, osmium, iridium, thorium,and uranium. More information is summarized on a data sheet.

Some further comments about the systems above.

Mercury + Gallium (ref. 8). The mercury rich phase in equilibrium withthe gallium rich phase contains 0.036 and 0.039 mole fraction gallium at308 and 373 K, respectively.

Mercury + Silicon + Phosphorous (ref. 12). Silicon at 1473 K was dopedwith phosphorus. The mercury solubility is a function of the phosphorusconcentration. We estimate from the abstract data that the mole fractionof mercury increases from 1 x 10- 1 to 2 x 10- 1 as the phosphorous molefraction increases from 4 x 10-10 to 8 X 10- 5 •

Mercury + Potassium (ref. 13). The authors were unable to obtain reproducible data. The solubility is less than in sodium. There were indications the solubility decreased as the temperature increased from 270 to318 K.

Mercury + Silver. Earlier studies (ref. 1, 14, 15) give appreciably lowerresults than the results of Day and Mathewson (ref. 3) presented here. Itis likely the earlier studies were carried out without proper precautionsto prevent loss of the volatile mercury.

Mercury + Platinum (ref. 11). An abrupt increase in the solubility atabout 523 K corresponds to a peritechtic reaction in the system.

Mercury + Gold. Mercury + gold solubility data are reported in at leastfive papers (ref. 1, 2, 3, 5, and 6). Data sheets were prepared fromreferences 3 and 6. The data in the table above are from ref. 6. Thepapers agree that an alpha + beta = alpha + liquid transformation occursat 693 K, which is the temperature of the maximum mercury solubility.

REFERENCES:

1. Stenbeck, S. Z. anorg. Chem. 1933, 45, 16.

2. Zakharova, M. I. Zh. Tekhn. Fiz. 1937, 7, 171.

3. Day, H. M., Mathewson, C. H. Trans. Am. Inst. Min. Metat 1.. Pet. Eng.1938, 128, 261.

4. Haring, M. M., White, J. C. Trans. Etectrochem. Soc. 1938,?3, 211.

5. P1aksin, I. N. Iav. Sekt. Fia. - Khim. Anatiaa 1938, 10, 129.

6. Owen, E. A., Roberts, E. A. O. J. Inst. Metats 1945,71, 213.

7. Rotatiu, G. J., Schramke, E., Gilman, T. S., Hildebrand, J. H. J. Am.Chem. Soc. 1951,73,2527.

8. spicer, W. M., Bartholomay, H. W. J. Am. Chem. Soc. 1951, 73, 868.

9. Abdullaev, G. B. ; Movlanov,Iav. Akad. Nauk Tadah. SSR~

13, Chem. Abstr. 1964, 61,

10. Bianchini, A.; Pozzoli, S.

11. Jangg, G., Lugscheider, E.

Sh., Shakhtakhtinskii, M. G., Ku1iev, A. A.Otd. Geot. - Khim.~ Tekhn. Nauk 1963, (2),1345e.

Metat t. Itat. 1968, 60, 495.

Monatsh. Chem. 1973, 104, 1269.

12. Arifov, A. A., Rakhimbaev, D., Is1amov, D. U. Legir. Potuprovochu.1975, 62, Chem. Abstr. 1975, 83, 121536b.

13. A1eksandrov, B. N., Da1akova, N. V. Izv. Akad. Nauk SSSR~ Met. 1982,(1), 133, RUBB. Metat t.(Engt. Transt.), 1982, (1), 117.

14. Preston, D. G. J. Inst. Metats 1931, 46, 522.

15. Murphy, A. J. J. Inst. Metats. 1931, 46, 507.


COMPONENTS:

(1) MercurY1 Hg1 £7439-97-6]

(2) Phosphorous 1 P4 1 [7723-14-0]

VARIABLES:

UK = 298.15

EXPERIMENTAL VALUES:

ORIGINAL MEASUREMENTS:

Rotatiu, G. J.1 Schramke, E.1Gilman, T. S.1 Hildebrand, J. H.

J. Am. Chem. Sao. ~, ?3,2527 - 8.

PREPARED BY:H. L. CleverM. Iwamoto

-------------------------------------------------

Water saturated phosphorus

Temperature

tfOc TIK

EquilibrationTimetim

Solubility

~~-~~-~~-~_:~~_:!

25.0 298.15

Dry phosphorus

25.0 298.15

12 0.810 1.015 1.020 1.030 1.010 l.na10 0.90a

17 1.4517 1.2517 0.7417 1.28

aThese two runs were made using a microbalance.Their average was used along with a phosphorusdensity of 1.761 9 cm -3 (ref. 1) to calculatethe solubility in the following units:

0.285 mg g-l (1.42 x 10- 3 mol kg- 1 )

1.76 x 10~~ mol mol- 1 (mole fraction, =1)3•7 x 10 - S cm 3 cm - 3 •

AUXILIARY INFORMATION

METHOD/APPARATUS/PROCEDURE:

About 2 - 4 9 of carefully weighedHg was placed in a J shaped 20 x 1.0cm tube. Air free water was addedand 2 cm 3 of liquid white phosphoruspipet ted was in under the watersurface at 44°C. The tubes wererocked slowly at 25.0 o C.

The water and phosphorus saturatedwith Hg were poured out. Lastamounts were removed by severalwashings with specially purified CS2and CH 30H. The Hg was dr ied anareweighed.

For the dry phosphorus experiments,the water was removed by alternatelymelting the phosphorus and evaporation.The solubility of water in phosphorus was reported in a later paper(ref. 2).Experiments to 373 K indicated onlya slight increase in solubility withtemperature.

SOURCE AND PURITY OF MATERIALS:

(1) Mercury. No information.

(2) Phosphorus. Commercial c.p.whi te phosphorus. Cleaned bymelting under a dilute H2S04 K2Cr04 mixture1 allowed to standseveral days in the dark. Theclear colorless liquid phosphorus was used.

ESTIMATED ERROR:

&TIK = ±O.l&01101 = ±0.25

REFERENCES:

1. Dobinski, S.Z. Phys. 1933, 83, 129.

2. Rotariu, G. J.1 Haycock, E. W.1Hildebrand, J. H.J. Am. Chem. Sao. 1952, ?4,3165.


COMPONENTS:

(1) Mercury; Hg; [7439-97-6]

(2) Gallium; Ga; [7440-55-3]

VARIABLES:

T/K = 308.15, 373.15



Spicer, W. M.; Bartholomay, H. W.

J. Am. Chem. Soc. 1951, 73,868 - 9.

PREPARED BY:

H. L. Clever

Temperature Mercury Rich Layer Gallium Rich Layer------------------------ -----------------------

tfOC T/K Mercury Gallium Mercury Galliumweight % weight % weight % weight %

---- ------ --------- ------------ ------------ --------35 308.15 98.8 1.2 6.0 94.0

98.6 1.4 6.7 93.398.8 1.2a 6.6 93.4a98.7 1.3a 6.7 93.3a--------- ------------98.7 avg. (3.6 atom %) 6.5 avg.

(2.0 atom %)

100 373.15 98.6 1.4 8.5 91.598.6 1.4 8.5 91.598.6 1.4 8.8 91.2--------- ------------98.6 avg. 8.6 avg.

(3.9 atom %) (3.2 atom %)

aEquilibtated for two months.

ADDED NOTE: See Hirayama, C.; Galus, Z.; Guminski, C. Metale in Mercury~

Solubility Seriee Volume 25, Pergamon Press Ltd., Oxford and NewYork, 1986, pp. 93 - 102 for a complete set of data and evaluation ofthe Hg + Ga system.



Weighed portions of the metals (ca.3.5 g Ga and 7.0 g Hg) were placedin a glass tube under acidifiedgallium chloride solution to protectthe gallium surface from oxidation.

Samples were equilibrated by frequent shaking in a thermostat. Thetwo phases were sampled, weighed andthe gallium was removed by dissolution in HC1. The remaining mercurywas dried and weighed.

Two samples were allowed to standfor two months before analysis toshow separation was complete.


(1) Mercury. Purified by washingwith nitric acid and water, andthen dried and distilled.

(2) Gallium. Aluminum Co. of America. Stated purity of 99.95%and confirmed by spectrographicanalysis.

ESTIMATED ERROR:

REFERENCES:


COHPONENTS:

(1) Mercury; Hg; [7439-97-6]

(2) Metals listed below.


Jangg, G.; Lugscheider, E.

Monatsh. Chem. 1973, 104,1269 - 75.

EXPERIMENTAL VALUES:. Mercury has negligible solubility at the temperature of heat treatment inthe metals below.

Atomic Name symbol Registry Number Heat Treatment Temperature

Number

1322232425

2728404142

4445737475

76779092

AluminiumTitaniumVanadiumChromiumIron

CobaltNickelZirconiumNiobiumMolybdenum

RutheniumRhodiumTantalumTungstenRhenium

OsmiumIridiumThoriumUranium

AlTiVCrFe

CoNiZrNbMo

RuRhTaWRe

OsIrThU

[7429-90-5][7440-32-6][7440-62-2][7440-47-3][7439-89-6]

[7440-48-4][7440-02-0][7440-67-7][7440-03-1 ][7439-98-7]

[7440-18-8][7440-16-6]£7440-25-7][7440-33-7][7440-15-5]

£7440-04-2][7439-88-5]£7440-29-1][7440-61-1]

tiD C

260280, 400 to 500800400800

800260280, 400 to 500800800

800800800800(l00 to 500) a

800800800800

TIK

533.15553.15

1073.15673.15

1073.15

1073.15533.15553.15

1073.151073.15

1073.151073.151073.151073.15

373.15

1073.151073.151073.151073.15

--------------------------------------------------------------------------a No evidence of compound formation with mercury over the temperatureinterval.

The elements above, which showed a negligible solubility for mercury, areshown below in an abbreviated periodic table.

13AI

22 23 24 26 27 28Ti V Cr Fe Co Ni

40 41 42 44 45Zr Nt> Mo Ru Rh

73 74 75 76 77Ta W Re Os Ir

90 92Th U

The authors observed measurable solubility of mercruy in manganese, atomicnumber 25, and platinum, atomic number 78. See following data sheets.

METHOD/APPARATUS/PROCEDURE:Between 0.2 and 0.3 g of high purity powdered samples of each metal abovewas heated with 5 to 10 percent of its weight of mercury in a 2 mm insidediameter quartz tube for periods of up to 350 hours. The metal latticeparameter of each metal was measured by an x-ray method before and afterthe heating with mercury. If the lattice parameter changed less than0.001 Angstrom the authors assumed negligible solubility of mercury in themetal.


COMPONENTS:

(1) MercurYI Hgl [7439-97-6]

(2) Sodium, Na, [7440-23-5]Potassium, KI [7440-09-7]

VARIABLES:

T/K = 270 - 333



Aleksandrov, B. N.1 Dalakova, N. V.

I2V. Akad. Nauk SSSR~ Met. 1982,(1), 133 - 401 Russ. Metatt. (Engt.Transt.) 1982, (1), 117 - 21.

PREPARED BY:

H. L. Clever

Element Temperature Mercury Solubility

tfOc T/K Atom %--------- ---- --- ------------------Sodium 23 296 0.045

60 333 0.006

Potassium -3 270 Non-reproducible45 318 resul ts. Evidence

solubility de-creased at T in-creased.

Distribution studies at 700°C (973 K) for sodiumand 600°C (873 K) for potassium indicated negligible solubility.


METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS:

solubilities were determined by aresidual electrical resistance meth-od. Samples of 7 to 8 g of alloywere prepared in steel containersunder a helium atmosphere. Theywere annealed for a number of days.

The alloy was extruded with a pressto 150 - 400 mm by 3 mm diameterwire. The resistance was measuredat room and liquid helium temperatures. Details of the method are inan earlier paper (ref. 1). ESTIMATED ERROR:

The solubility of about another 12elements was determined.

REFERENCES:

1. Aleksandrov, B. N. et at.Fi•• Ni.k. Temp. (Kiev) 1976, 2,1432.


COMPONENTS:

(1) MercurY7 Hg7 £7439-97-6]

(2) Phosphorous7 P7 [7723-14-0]

(3) Silicon7 Si7 [7440-21-3]

VARIABLES:

T/K = 1473


Arifov, A. A.7 Rakhimbaev, 0.7Islamov, D. U.

Legir. Potuprovodu. 1975, 62 - 47Chem. Abstr. 1975, 83, l21536b.

PREPARED BY:

H. L. Clever


The paper was not available. The information is from theabstract. Silicon at 1200 °C and 1 x 10-~ torr was dopedwith 2 x 10 13 to 4 X 10 1 ' atom cm- 3 of phosphorous. Themercury concentration (solubility) is a function of thephosphorus concentration and varies from 5 x 10 13 to 1 X

10 15 atom cm- 3 •

The compiler estimated a silicon density of 2.3 9 cm- 3 at1473 K from crytallographic data (R. o. A. Hall Acta Crytt.1961, 14, 1004) to calculate mole fractions. Thus, as thephosphorus mole fraction increases from 4 x 10- 10 to 8 X10- 5 the mercury mole fraction (solubility) increases from 1x 10-' to 2 x 10-'.



ESTIMATED ERROR:

REFERENCES:

220

COMPONENTS:

Mercury in Other Elements

ORIGINAL HEASUREHENTS:

(1) Mercury; Hg; [7439-97-6]

(2) Manganese; Mn; [7439-96-5]

VARIABLES:

P/K = 773.15


Jangg, G.; Lugscheider, E.

Monateh. Chem. 1973, 104,1269 - 75.

PREPARED BY:

H. L. Clever

Temperature

tJOC

500

P/K

773.15

Solubilitya

Atom % Hg

0.3 - 0.5

aCompiler assumes this is thesame as 10 2: 1 , mole fraction.


HETHOD/APPARATUS/PROCEDURE:

Between 0.2 and 0.3 g of highlypurified metal powder was placed ina 2 mm inside diameter quartz tube.Mercury was added. The tube wasevacuated, sealed and heat treatedfor up to 350 hours at the statedtemperature.

The metal lattice parameter wasdetermined by x-ray before and afterheating with mercury. A change inlattice parameter of 0.001 or lesswas interpreted as a negligiblesolubility of mercury in the metal.There was a direct relationshipbetween the mercury solubility andthe lattice parameter.


Stated to be high purity metals.

ESTIMATED ERROR:

REFERENCES:


COMPONENTS:

(1) Mercury; Hg; [7439-97-6]

(2) Zinc; Zn; [7440-66-6]

VARIABLES:

T/K = 293


Temperature


Bianchini, A.; Pozzoli, S.

Nstatt. Itat. 1965, 60, 495 - 500.

PREPARED BY:

H. L. Clever

Mercury Solubility

trc

20

UK

293

weight ,

6.0

atom ,

2.0

The compiler calculated the atom ,solubility and added the Kelvin temperature.

The results were in graphs which couldbe read to within 0.2 weight ,.



The electrolytic behavior of amalgamated zinc was studied in sevenaqueous electrolytes. The mercurycontent was varried up to 10 wt ,.The potential became more negativeup to 6 wt 'mercury. Beyond 6 wt ,mercury the potential remained constant. This suggests the limit ofmercury solubility in zinc is 6weight percent which is in agreement with an (unpublished) x-raystudy.


(l) Mercury.

(2) Zinc. Impurities were Cd 15, PdO.S, Cu 0.9, and Fe 0.5 partsper million. Some tests weremade on 99.9999 , zinc.

ESTIMATED ERROR:

REFERENCES:


COMPONENTS:

(1) Mercury; Hg; [7439-97-6]

(2) Silver; Ag; [7440-22-4]

VARIABLES:

TIK = 373.15 - 549.15



Day, H. M.; Mathewson, C. H.

Trans. Am. Inst. Min. Metall. Eng.1938, 128, 261 - 81.

PREPARED BY:

H. L. Clever

----------------------------------------Temperature Mercury Solubility

t/DC TIK weight % Atom %---- ------ -------- ------100 373.15 51.6 36.4

186 459.15 - -245 513.15 - -276 549.15 52.4 37.2

The measurements at 459.15 and 513.15 Kare shown on a graph, but are not tabulated. The four values fallon a smoothcurve over the 373.15 to 549.15 K temperature interval.

The compiler calculated the atom % mercury and added the Kelvin temperatures.


METHOD/APPARATUS/PROCEDURE:The system was studied by a backreflection method of x-ray analysis.

particular attention was paid tosample preparation and annealing toavoid loss of the volatile mercury.

SOURCE AND PURITY OF MATERIALS:(1) Mercury. Redistilled. Tested

to show it contained less than0.001 % total Ag and Au.

(2) Silver. US Metals Refining Co.Analysed 99.993 % silver. Sample tested for AU, Cu, Fe, Pb,Bi, Se, Te, Sn, Ni, Mn, and Mg.Results in table in paper.

ESTIMATED ERROR:

REFERENCES:


COMPONENTS:

(1) Mercury; Hg; 17439-97-6]

(2) Tin; Sn; [7440-31-5]

VARIABLES:

T/K = 298.15


Temperature

T/K


Haring, M. M.; white, J. C.

Trans. EtBctrochem. Soc. 1938,73, 211 - 21.

PREPARED BY:

H. L. Clever

Mercury Mole Fraction

:1:1

25.00 298.15 0.075

The authors report the Sn + Hg solid tobe 0.925 mole fraction tin.



A carefUl emf study of tin amalgams.The solUbility of mercury in tin wascalculated assuming the Nernst equation was valid for the 1.0 millivoltdifference observed between tin andits saturated amalgam.


ESTIMATED ERROR:

llTIK = ±0.02

REFERENCES:


COMPONENTS:

(1) Mercury; Hg; [7439-97-6J

(2) Tellurium; Te; [13494-80-9J

VARIABLES:

T/K • 543 - 713



Abdullaev, G. B., Movlanov, Sh.,Shakhtaktinskii, M. G.; Kuliev, A. A.

I.v. Akad. Nauk Tad.h. SSR~ Otd.Gaol. - Khim. i Takhn. Nauk 1963,(2J, 13 - 22.Chem. Ab8t~. 1964, 61, l345e.

PREPARED BY:

H. L. Clever

-----------------------------------------------Temperature Mercury Solubility

trC T/K c1/atom cm- a Atom Fraction---- --- ------------ -------------270 543 - -300 573 4 x 10 10 0.014

440 713 1 x 10 10 0.003

The atom fractions were calculated by the compiler using the 293 K Handbook density of tellurium.

The paper was not available. The informationis from the abstract. The solubility was measured from 543 to 713 K. only the maximum valueat 573 K and the minimum value at 713 K weregiven in the abstract. The authors state thatHgTe is formed in the system. The solubilityof mercury is smaller than the solubility ofselenium which is also reported in the paper.There is a statement in the abstract that thesaturation at 77 K is 0.1 'mercury. The valuewould represent an atom fraction of 0.0006.



ESTIMATED ERROR:

REFERENCES:


COMPONENTS:

(1) Mercury, Hg, [7439-97-6]

(2) Platinum, Pt, [7440-06-4]

VARIABLES:

T/K = 373.15 - 903.15



Jangg, G., Lugscheider, E.

Monatah. Chem. 1973, 204,1269 - 75.

PREPARED BY:

H. L. Clever

------------------------------Temperature Solubilitya

tlOC T/K Atom % Hg---- ------ -----------100 373.15 0200 473.15 0.2220 493.15 1.0255 528.15 15.3307 580.15 16.1367 640.15 16.5395 668.15 18.5440 713.15 18.1482 755.15 18.7540 813.15 18.9630 903.15 22.6

aCompiler assumes this is the same as 10 2 =2' mole fraction.

The abrupt increase in solubility at about 250°C corresponds to a peritectic reaction in the Pt-Hg system.



Between 0.2 and 0.3 g of highlypurified metal powder was placed ina 2 mm inside diameter quartz tube.Mercury was added. The tube wasevacuated, sealed and heat treatedfor up to 350 hours at the statedtemperature.

The metal lattice parameter wasdetermined by x-ray before and afterheating with mercury. A change inlattice parameter of 0.001 or lesswas interpreted as a negligiblesolubility of mercury in the metal.There was a direct relationshipbetween the mercury solubility andthe lattice parameter.


Stated to be high purity metals.

ESTIMATED ERROR:

REFERENCES:


COMPONENTS:

(1) MercurYl Hgl [7439-97-6]

(2) Gold, AUl [7440-57-5]

VARIABLES:

T/K = 373.15 - 689.15


Day, H. M.l Mathewson, C. H.

Trans. Am. Inst. Min. Metall. Eng.1938, 128, 261 - 81.

PREPARED BY:

H. L. Clever


-----------------------------------------Temperature Mercury Solubility

t/oC UK Weight % Atom %----- ------ -------- ------100 373.15 17.2 16.9

186 459.15 16.1 15.8

245 518.15 16.0 15.7

300 573.15 16.3 16.0

320 593.15 17.1 16.8

390 663.15 18.5 18.1

416 689.15 18.7 18.4

The authors believe the inflection in thethe solubility curve at about 603 K isreal.

The compiler calculated the atom % mercury and added the Kelvin temperatures.



The system was studied by a backreflection method of x-ray analysis.

Particular attention was paid tosample preparation and annealing toavoid loss of the volatile mercury.


(1) Mercury. Redistilled. Testedto show it contained less than0.001 % total Ag and Au.

(2) Gold. Source not given. Contained unmeasurable trace ofsilver. No other impuritiesdetected.

ESTIMATED ERROR:

REFERENCES:


COMPONENTS:

(1) Mercury, Hg, [7439-97-6]

(2) Gold, AU, [7440-57-5]

VARIABLES:

T/K = 477 - 693



Owen, E. A., Roberts, E. A. O.

J. Inst. Metals 1945, 71,213 - 53.

PREPARED BY:

H. L. Clever

Temperature Mercury solubility

tfOC T/K Atom %---- --- ------------------204 477 16.8

310 583 18.2

420 693 19.5 (max)

The compiler added the Kelvin temperatures.

The transformation

(alpha + beta) = (alpha + liquid)

occurs at 693 K, the temperature of themaximum solubility.


METHOD/APPARATUS/PROCEDURE:The alpha phase boundry of the Hg +Au system was determined by the xray method.

Alloys of 17.45 and 19.5 atom % Hgwere prepared by heating weighedsamples in evacuated silica tubes.Mel ts were shaken for up to 15 min,then either slow cooled or rapidlyquenched. They were tested forhomgeneity. Lump annealed for up toseven weeks, powder annealed for up12 hours at the temperature of thesolubility measurement.

SOURCE AND PURITY OF MATERIALS:(1) Mercury. Source not given.

Stated to be 99.99 %.

(2) Gold. Source not given. Statedto be 99.99 %.

ESTIMATED ERROR:

6T/K = + (2 - 5)± 1 atom % (authors).

REFERENCES:

srdata.nist.gov · 214 mercury in other elements jangg and lugscheider (ref. 11) found negligible...

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